Returns the absolute value of the given number.
SDK
- Xcode 9.0+
Framework
- Swift Standard Library
Declaration
func abs<T>(_ x: T) -> T where T : Comparable, T : SignedNumeric
Parameters
xA signed number.
Return Value
The absolute value of x.
Discussion
The absolute value of x must be representable in the same type. In particular, the absolute value of a signed, fixed-width integer type’s minimum cannot be represented.
let x = Int8.min
// x == -128
let y = abs(x)
// Overflow error